Pittsburgh Modular Mixer

A flexible, low-noise four channel mixer and/or attenuator for audio and cv that can be used in several ways. Three of the four channels have an output that removes the channel from the mixer circuit and allows it to become a standalone attenuator.The pots are wired with a logarithmic volume curve that is tuned for use with audio but it will work with CV as well.

Patching the output of channel 1, 2, or 3 will remove it from the mixer circuit. Channel 4 can not be removed from the mixer circuit, however if channel 1, 2, and 3 are all being used as attenuators, channel 4 is the only input remaining in the mixer allowing it to be used as a buffered attenuator.The power connector is mounted on the back horizontally. +12v is located on the inside (or right) of the connector and -12v is on the left side (or edge) of the module.